Lena Dunham has already proven her skill as a writer, director and actress, and now the Girls star has demonstrated one additional talent: supportive rock star girlfriend to Jack Antonoff.

The HBO darling, 27, was spotted with a small group of friends in the VIP section of the Troubadour in West Hollywood Wednesday night "laughing, clapping and pointing out her man's antics," a source tells PEOPLE.

"She stood almost the entire time," the source continued. "She bopped her head and occasionally pointed to the stage and whispered in her friends' ears with a big smile on her face as though she was so proud of her man. It was clear she was focused on him the entire night."

Selena Gomez had a girls' night out at Bootsy Bellows in West Hollywood Saturday night, dancing along to a string of her hits with her pals (no Austin Mahone or Justin in sight!).

The starlet, who turns 21 this month, spent some time in the club's main room, where she requested Iggy Azalea's song "Work" from DJ Savi, before popping into the VIP room and asking that deejay to play some of her own songs, according to a source.

When the deejay obliged, Gomez's friends "all screamed and danced" as her latest single, "Come & Get It," started up. "Selena seemed to be in great spirits and looked like she was having a lot of fun," the source says.

Despite her group's enthusiasm, Gomez managed to fly under the radar throughout the evening, sticking close to her table in the club's back corner before leaving with her posse.
– Raha Lewis

But on Wednesday, the singer had a low-key evening with two female friends at the Chateau Marmont in West Hollywood.

With two tables full of bodyguards sitting behind her, Gaga looked "quite tired and somber" throughout the evening, an onlooker tells PEOPLE. "She was talking low and leaning into her friends. She didn't laugh or smile the entire time, just straight-faced chatting and sipping on some wine."